LP2981

Micropower 100 mA Ultra Low-Dropout Regulator

General Description

The LP2981 is a 100 mA, fixed-output voltage regulator de-

signed

specifically

to

meet

the

requirements

of

battery-powered applications.

cess, the LP2981 delivers unequaled performance in all

specifications critical to battery-powered designs:

Sleep Mode. Less than 1 µA quiescent current when ON/

OFF pin is pulled low.

Smallest Possible Size. SOT-23and micro SMD packages

use an absolute minimum board space.

Precision Output. 0.75% tolerance output voltages avail-

able (A grade).

Eleven voltage options, from 2.5V to 5.0V, are available as

standard products.

Features

n

Ultra low dropout voltage

n

Output voltage accuracy 0.75% (A Grade)

n

Guaranteed 100 mA output current

n

Smallest possible size (SOT-23, micro SMD package)

1 µA quiescent current when shutdown

n

Low ground pin current at all load currents

n

High peak current capability (300 mA typical)

n

Wide supply voltage range (16V max)

n

Fast dynamic response to line and load

n

Low Z

n

Overtemperature/overcurrent protection

n

−40˚C to +125˚C junction temperature range

Applications

n

Cellular Phone

n

Palmtop/Laptop Computer

n

Personal Digital Assistant (PDA)

n

Camcorder, Personal Stereo, Camera

Block Diagram

DS012506-1

March 2000

© 2000 National Semiconductor Corporation

DS012506

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